James bujac



(No Model.)

.J. BUJA G.

GRATE FOR BURNING GOAL DUST.

No. 346,086. Patented July 27, I886.

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UNITED STATES PATENT OFFICE.

JAMES BUJAC, OF OATONSVILLE, MARYLAND.

GRATE FOR BURNING COAL-DUST.

SPECIFICATION forming part of Letters Patent No. 346,086, dated July 2'], 1886.

Application filed July 21, 1885.

To all whom it may concern.-

Be it known that I, JAMES BUJ'AC, a citizen of the United States, residing at Gatonsville, in the county of Baltimore and State of Maryland, have invented certain new and use ful Improvementsin Grates for Burning Coal- Dust; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this grate is to burn coalslackthat is, the dust or fine particles separated by screening or other means from merchantable coal.

Figure 1 represents a plan view of a floor of brick or other refractory substance, which is perforated with vents or holes B,- through which atmospheric air is admitted to the firebox or furnace in contact with the fuel. 0 are openings in the floor or grate, which are covered with conical-shaped caps G, which are made of brick or other refractory sub from the blast, by which atmospheric air, gas, or vapor is propelled into the ash-pit for supplying atmospheric oxygen.

F F F, &c., are

Serial No. 172,932.

(No model.)

stoke-holes sufliciently-large to admit of a rod or poker into the furnace or fire-box for purpose of stoking or agitating the fuel. These stoke-holes are fitted with the proper means for closing them when not in use.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. An arched floor, hearth, or grate for furnaces, made of brick or other refractory substances perforated with vents, and having located upon it a series of conical caps or coverings, for the purpose of dividing the mass of fuel on the hearth into small bodies, and perforated with vent-holes in a horizontal direction, each cap having a communication with the ash-pit to permit the passage of atmospheric air, gas, or vapor from the pit into the interior of the cap, to be distributed into the surrounding mass of fuel through the vents in the side of the conical cap, all substantially as and for the purpose described.

2. A furnace constructed, substantially as described, with conical caps arranged serially upon the floor, and having a series of holes around the base of the boiler to admit a bar for stirring and lifting the fuel, substantially as described.

JAMES BUJAO.

Vitnesses:

M. R. BUJAO, WARREN C. STONE. 

